1306449943 has 2 divisors, whose sum is σ = 1306449944. Its totient is φ = 1306449942.

The previous prime is 1306449941. The next prime is 1306450001. The reversal of 1306449943 is 3499446031.

It is a weak prime.

It is an emirp because it is prime and its reverse (3499446031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1306449943 - 2¹ = 1306449941 is a prime.

It is a super-2 number, since 2×1306449943² = 3413622907129406498, which contains 22 as substring.

Together with 1306449941, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1306449943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306449941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653224971 + 653224972.

It is an arithmetic number, because the mean of its divisors is an integer number (653224972).

Almost surely, 2^1306449943 is an apocalyptic number.

1306449943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306449943 is an equidigital number, since it uses as much as digits as its factorization.

1306449943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 1306449943 is about 36144.8467004634. The cubic root of 1306449943 is about 1093.1948861002.

The spelling of 1306449943 in words is "one billion, three hundred six million, four hundred forty-nine thousand, nine hundred forty-three".